# A Software Simulator for Noisy Quantum Circuits

## TL;DR

This paper introduces a software simulator for noisy quantum circuits that models errors in quantum operations using density matrices within the Qiskit framework, aiding in the development and testing of quantum algorithms under realistic noise conditions.

## Contribution

It presents a novel backend for Qiskit that simulates noise in quantum circuits using density matrices, enabling more accurate testing of quantum algorithms.

## Key findings

- Successfully integrated as a Qiskit backend
- Simulated various noise models in quantum circuits
- Demonstrated with simple quantum circuit examples

## Abstract

We have developed a software library that simulates noisy quantum logic circuits. We represent quantum states by their density matrices in the Pauli basis, and incorporate possible errors in initialisation, logic gates, memory and measurement using simple models. Our quantum simulator is implemented as a new backend on IBM's open-source Qiskit platform. In this document, we provide its description, and illustrate it with some simple examples.